JPH0218157B2 - - Google Patents
Info
- Publication number
- JPH0218157B2 JPH0218157B2 JP58215057A JP21505783A JPH0218157B2 JP H0218157 B2 JPH0218157 B2 JP H0218157B2 JP 58215057 A JP58215057 A JP 58215057A JP 21505783 A JP21505783 A JP 21505783A JP H0218157 B2 JPH0218157 B2 JP H0218157B2
- Authority
- JP
- Japan
- Prior art keywords
- heat
- drying
- water
- air
- aeration
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 27
- 238000005273 aeration Methods 0.000 claims description 23
- 238000001035 drying Methods 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 10
- 239000007787 solid Substances 0.000 claims description 8
- 230000000717 retained effect Effects 0.000 claims description 7
- 239000010865 sewage Substances 0.000 claims description 5
- 238000010521 absorption reaction Methods 0.000 claims description 4
- 230000005855 radiation Effects 0.000 claims description 4
- 239000011343 solid material Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 2
- 239000010800 human waste Substances 0.000 description 8
- 239000003507 refrigerant Substances 0.000 description 6
- 239000010802 sludge Substances 0.000 description 6
- 239000002351 wastewater Substances 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 3
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000010790 dilution Methods 0.000 description 2
- 239000012895 dilution Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 238000009264 composting Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000001877 deodorizing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 238000010169 landfilling Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Description
【発明の詳細な説明】
本発明は、各種産業分野において発生する含水
固形物の省エネルギ的な乾燥方法に関するもので
ある。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an energy-saving method for drying water-containing solids generated in various industrial fields.
含水固形物、例えば有機性汚水や汚泥の処理施
設から発生するし渣、汚泥などは、各種の機械脱
水機で脱水しても脱水ケーキの含水率は80％前後
と高いため、そのままでは焼却、堆肥化、埋立て
などの処分にはきわめて不都合である。そのため
に、処分に先立つて脱水ケーキをさらに乾燥する
必要がある。 Water-containing solids, such as sludge and sludge generated from processing facilities for organic sewage and sludge, are dehydrated using various mechanical dewatering machines, but the water content of the dehydrated cake is as high as around 80%, so if left as is, it must be incinerated or It is extremely inconvenient for disposal such as composting or landfilling. This requires further drying of the dehydrated cake prior to disposal.
従来、含水固形物の乾燥方法としては種々の方
法が採用されているが、
乾燥用の熱源として多量の有価エネルギを消
費する。 Conventionally, various methods have been adopted for drying water-containing solid materials, but they consume a large amount of valuable energy as a heat source for drying.
悪臭をもつ乾燥排ガスが発生する。とくに高
温の熱風で乾燥すると強烈な悪臭（コゲ臭）を
発生する。 Dry exhaust gas with foul odor is generated. In particular, when dried with high-temperature hot air, a strong odor (burnt odor) is generated.
装置の構造が複雑で、かつ所要容積が大き
い。 The structure of the device is complex and the required volume is large.
といつた欠点を有しており、そのなかでも最大の
解決課題は乾燥に要するエネルギの節減である
が、未だ十分に解決されていないのが現状であ
る。Among them, the biggest problem to be solved is to reduce the energy required for drying, but this has not yet been satisfactorily solved.
本発明は、従来全く顧みられずに無駄に廃棄さ
れていたエネルギに着目して完成されたものであ
る。 The present invention was completed by focusing on energy that has been completely ignored and wasted in the past.
すなわち、し尿、下水、各種産業廃水などの有
機性汚水を、活性汚泥法などの好気条件において
生物処理する場合には、エアレーシヨンが不可欠
である。このような有機性汚水の生物処理工程に
おける熱収支をとつてみたところ、曝気槽におい
てエアレーシヨンに利用されたのち水面から流出
する空気の保有エンタルピがきわめて大きいこと
に着目し、この流出空気の保有エンタルピを回収
し含水固形物の乾燥用熱源として利用するとい
う、全く新規な技術的思想に到達して本発明を完
成したものである。 That is, aeration is essential when organic wastewater such as human waste, sewage, and various industrial wastewaters is subjected to biological treatment under aerobic conditions such as the activated sludge method. When we measured the heat balance in the biological treatment process of such organic wastewater, we noticed that the retained enthalpy of the air that flows out from the water surface after being used for aeration in the aeration tank is extremely large. The present invention was completed by arriving at a completely new technical idea of recovering the water and using it as a heat source for drying water-containing solids.
本発明は、有機性汚水の生物処理工程のエアレ
ーシヨンに利用されたのち曝気槽の水面から流出
する空気の保有熱を回収、有効利用し、前記従来
の乾燥方法の欠点を解消する省エネルギ的な乾燥
方法を提供することを目的とするものである。 The present invention is an energy-saving method that eliminates the drawbacks of the conventional drying method by recovering and effectively utilizing the retained heat of the air that flows out from the water surface of the aeration tank after being used for aeration in the biological treatment process of organic wastewater. The purpose is to provide a drying method.
本発明は、有機性汚水の生物処理工程のエアレ
ーシヨンに利用されたのち曝気槽の水面から流出
する空気の保有熱を回収し、該回収熱を含水固形
物の乾燥用熱源として利用することを特徴とする
ものである。 The present invention is characterized in that the heat retained in the air flowing out from the water surface of the aeration tank after being used for aeration in the biological treatment process of organic wastewater is recovered, and the recovered heat is used as a heat source for drying water-containing solids. That is.
さらに本発明の一実施例を、有機性汚水として
し尿を例にとり、図面を参照しながら説明すれば
次の通りである。 Further, one embodiment of the present invention will be described below with reference to the drawings, taking human waste as an example of organic sewage.
除渣されたし尿１は、希釈水が添加されること
なく、活性汚泥処理工程の曝気槽２に導かれ、曝
気ブロワ３の吐出空気４の散気によりエアレーシ
ヨンされ、BODの除去、NH3−Ｎの硝化が行わ
れたのち、処理後のスラリ５は後続する固液分離
工程（図示せず）に導かれる。 The removed human waste 1 is led to the aeration tank 2 of the activated sludge treatment process without adding dilution water, where it is aerated by the aeration of the discharged air 4 of the aeration blower 3 to remove BOD and NH 3 − After the N nitrification is performed, the treated slurry 5 is led to a subsequent solid-liquid separation step (not shown).
しかして、曝気槽２においてエアレーシヨンに
利用された空気は、水面からの流出空気６となり
ダクト７に進入してゆく。この場合、曝気槽２に
はカバー８を付設し、外気が混入しないようにし
ておくことが好ましい。この流出空気６の温度t1
は、曝気槽２内の液温t2とほぼ同等であり、かつ
温度t1における飽和湿度に相当する水蒸気を含有
しているために、高いエンタルピをもつている。
とくに、し尿を無希釈で処理すると、曝気槽２に
おいてはし尿のBOD及びNH3−Ｎを酸化する微
生物の酸化熱によつて槽内水温は40℃以上にも達
するので、曝気槽２の水面からの流出空気６のエ
ンタルピは40kcal／Kgdryairと著しく高くなる。
たとえば、し尿100Kl／ｄの処理においては、14
×105kcal／ｄの熱を回収することができる。ち
なみに、本発明者の測定によれば、し尿１Klから
約30000〜40000kcalの微生物の酸化反応生成熱が
発生することを確認している。 Thus, the air used for aeration in the aeration tank 2 becomes outflow air 6 from the water surface and enters the duct 7. In this case, it is preferable to attach a cover 8 to the aeration tank 2 to prevent outside air from entering. The temperature of this outflow air 6 t 1
is almost the same as the liquid temperature t2 in the aeration tank 2, and contains water vapor corresponding to the saturated humidity at the temperature t1 , so it has a high enthalpy.
In particular, when human waste is treated without dilution, the water temperature in the aeration tank 2 reaches over 40°C due to the oxidation heat of microorganisms that oxidize BOD and NH 3 -N in the human waste, so the water surface of the aeration tank 2 The enthalpy of the outflowing air 6 is significantly high at 40kcal/Kgdryair.
For example, when processing 100 Kl/d of human waste, 14
×10 5 kcal/d of heat can be recovered. Incidentally, according to measurements made by the present inventor, it has been confirmed that approximately 30,000 to 40,000 kcal of heat produced by the oxidation reaction of microorganisms is generated from 1 Kl of human waste.
次に、ダクト７に進入した流出空気６はヒート
ポンプの吸熱部（冷媒蒸発部）９に導かれて冷却
される結果除湿され、膨大な水蒸気の凝縮潜熱
Q1を冷媒（フロンなど）に与え、自身は低湿度
の冷風１０となるが、この低湿、冷風を夏季冷房
用に利用することができる。なお、１１は凝縮水
のドレンを示す。 Next, the outflow air 6 that has entered the duct 7 is guided to the heat absorption part (refrigerant evaporation part) 9 of the heat pump, where it is cooled and dehumidified.
When Q 1 is applied to a refrigerant (such as Freon), it becomes low-humidity cold air 10, and this low-humidity, cold air can be used for summer cooling. Note that 11 indicates a drain for condensed water.
一方、ヒートポンプの放熱部（冷媒凝縮部）１
２からは、前記水蒸気の凝縮潜熱Q1とヒートポ
ンプの冷媒コンプレツサ１３の動力を熱量に換算
した値Q2の合計Q1＋Q2＝Q3を放熱する。１４は
冷媒膨張弁である。 On the other hand, the heat dissipation part (refrigerant condensation part) 1 of the heat pump
2, the sum Q 1 +Q 2 =Q 3 of the latent heat of condensation Q 1 of the water vapor and the value Q 2 obtained by converting the power of the refrigerant compressor 13 of the heat pump into heat quantity is radiated. 14 is a refrigerant expansion valve.
この放熱によつて、流体たとえば空気１５を加
温して温風１６（50〜60℃）をつくり、これを含
水固形物１７の通気乾燥工程１８に供給し、含水
率30％以下の乾燥物１９を得る。２０は乾燥排ガ
スである。 By this heat radiation, a fluid such as air 15 is heated to create hot air 16 (50 to 60°C), which is supplied to the aeration drying process 18 for the water-containing solid material 17 to dry the dry material with a moisture content of 30% or less. Get 19. 20 is dry exhaust gas.
なお、前記実施例において、流出空気６は水蒸
気で飽和しており、しかも微生物酸化反応熱によ
つて外気よりも高温度になつているから、ヒート
ポンプの吸熱部９において容易に水蒸気が凝縮さ
れ、さらにヒートポンプの低熱源（流出空気６に
相当する）とヒートポンプの放熱部１２の温度差
が小さいために、ヒートポンプの成績係数が向上
する。 In the above embodiment, the outflow air 6 is saturated with water vapor and has a higher temperature than the outside air due to the heat of the microbial oxidation reaction, so the water vapor is easily condensed in the heat absorption section 9 of the heat pump. Furthermore, since the temperature difference between the low heat source of the heat pump (corresponding to the outflow air 6) and the heat radiation section 12 of the heat pump is small, the coefficient of performance of the heat pump is improved.
この結果、きわめて省エネルギ的に含水固形物
の乾燥用熱源を得ることができるが、本発明では
流出空気６の保有熱回収を、ヒートポンプを利用
することなく、単なる熱交換を利用して回収し、
これを乾燥用熱源とすることもできる。 As a result, it is possible to obtain a heat source for drying water-containing solids in an extremely energy-saving manner.However, in the present invention, the retained heat of the outflow air 6 is recovered by simply using heat exchange without using a heat pump. ,
This can also be used as a heat source for drying.
以上述べたように本発明によれば、従来全く顧
みられずに廃棄されていた有機性汚水の曝気槽流
出空気の保有熱を回収し、これを含水固形物の乾
燥用熱源として利用するものであるから、次のよ
うな顕著な効果を得ることができる。 As described above, according to the present invention, the heat retained in the air flowing out of the aeration tank of organic sewage, which had been completely ignored and discarded in the past, is recovered and used as a heat source for drying water-containing solids. Because of this, you can get the following remarkable effects:
従来必要とされていた有価エネルギがほとん
ど不要となり、著しい省エネルギ効果がある。 Most of the valuable energy that was previously required is now unnecessary, resulting in significant energy savings.
乾燥温度が低温であるから、発生する乾燥排
ガスはほとんど悪臭を含まず、脱臭設備が不要
となる。 Since the drying temperature is low, the generated dry exhaust gas contains almost no bad odor, making deodorizing equipment unnecessary.
有機性汚泥などの脱水ケーキを自燃可能な程
度まで乾燥することができる。 Dehydrated cake such as organic sludge can be dried to the extent that it can self-combust.
図面は本発明の一実施例を示す系統説明図であ
る。
１……し尿、２……曝気槽、３……曝気ブロ
ワ、４……吐出空気、６……流出空気、７……ダ
クト、８……カバー、９……ヒートポンプの吸熱
部、１０……冷風、１２……ヒートポンプの放熱
部、１３……冷媒コンプレツサ、１５……空気、
１６……温風、１７……含水固形物、１８……通
気乾燥工程、１９……乾燥物、２０……乾燥排ガ
ス。
The drawing is a system explanatory diagram showing an embodiment of the present invention. 1... Human waste, 2... Aeration tank, 3... Aeration blower, 4... Discharge air, 6... Outflow air, 7... Duct, 8... Cover, 9... Heat pump heat absorption part, 10... Cold air, 12... heat pump heat radiation section, 13... refrigerant compressor, 15... air,
16... Warm air, 17... Water-containing solid matter, 18... Ventilation drying process, 19... Dry product, 20... Dry exhaust gas.
Claims (1)
に利用されたのち曝気槽の水面から流出する空気
の保有熱を回収し、該回収熱を含水固形物の乾燥
用熱源として利用することを特徴とする含水物の
乾燥方法。 ２ 前記曝気槽の水面から流出する空気の保有熱
をヒートポンプの吸熱源とし、該ヒートポンプの
放熱を含水固形物の乾燥用熱源として利用するも
のである特許請求の範囲第１項記載の含水固形物
の乾燥方法。[Claims] 1. Recovering the retained heat of the air flowing out from the water surface of the aeration tank after being used for aeration in the biological treatment process of organic sewage, and using the recovered heat as a heat source for drying water-containing solids. A method for drying a water-containing material. 2. The hydrated solid material according to claim 1, wherein the heat retained in the air flowing out from the water surface of the aeration tank is used as a heat absorption source of a heat pump, and the heat radiation of the heat pump is used as a heat source for drying the hydrated solid material. drying method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58215057A JPS60108682A (en) | 1983-11-17 | 1983-11-17 | Method of drying solid matter containing water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58215057A JPS60108682A (en) | 1983-11-17 | 1983-11-17 | Method of drying solid matter containing water |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60108682A JPS60108682A (en) | 1985-06-14 |
| JPH0218157B2 true JPH0218157B2 (en) | 1990-04-24 |
Family
ID=16666042
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58215057A Granted JPS60108682A (en) | 1983-11-17 | 1983-11-17 | Method of drying solid matter containing water |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60108682A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017213492A (en) * | 2016-05-30 | 2017-12-07 | アクアテクノＥｓｃｏ事業株式会社 | Sludge treatment equipment |
-
1983
- 1983-11-17 JP JP58215057A patent/JPS60108682A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60108682A (en) | 1985-06-14 |
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